Core for concrete molds



' v I I m'eil tm- J ,3/ Clareraqe 42in 3, 1943. c. A. KERR 2,325,686

I CORE FOR CONCRETE MOLD Filed Dec. 14, 1942 2 Sheets-Sheet l J 75 x gzuwm 1943. c. A. KERR 2,325,686

CORE FOR CONCRETE MOLD Filed Dec. 14, 1942 2 Sheets-Sheet 2 j fi'fl S Maya we; m

Patented Au 3,1g4 j r 1 crete lias set.

" Q orient the side wall r'ne'inbersof the cored v "F'g'ure *6 Ba viewin perspective or one oigthe 1 1 p a tm fmv nv uo' Myinventionrelatesj to improvements iri'seca tion'al cores for use in 1coric'retefifc'lrn'isln erecting V oellular concrte walls and the like.

'The 'invention i's designed-with ithe principal:

object in view of providing a simply constructed, inexpensive, strong device-of the character 'indicatedwhich-is especially adapted} for quick 7 and easy conditioning or use andifor disassein bly "and removal frdrn the: wall fatter} the con? Other andsubordinate?objects" are: also eon; prehended by my invention; all of which; to

getherwith the precise naturefoimy improve-1 mentsi w-lll-be readily understood when the-sue ceeding description and cljai'rr'is'are read with ref 1 erence to the drawings 1 accompanyingand forxn ing part of this specification.

I i d d win s: l

Figure '1 is a "fragmentary view meme clejv tion illustrating rnyirnprovem'entsQ *1 Figure 2 is-a view in'Ftop plan,

Figured isl-a -view in ve icalftransversesec tiontaken-onthe lineHofFigure-lp: f

is afview longitudinal sectionof the t Figure 4 core;

imam 5 is'a fragrnentaryview in perspective-off' fasteners;

Figure"? isa-iragmentaryyiew inlong itudirial vertical section of a cellularfwall' formedinjthe meme '8 isfa ira ew we mam ' ""Afiat coverI5,"of elongatedfrectangularform" rsil 9 ares'ecured to the inner side faces of said membe s 2 asat M} the upper keepers" B being 3 '6" are interposediflatwise between the cleats 3 i atopposite ends of the members 2, respectively;

paiall'elwith said end s'andfwith lower ends flush withathe bottom edge's'of the members 2, and one idfe f ieie c h is l inw y ir m endl to form keys for rnaintaining the core 1115- right in poured concrete." l "The'upper ends ofthe s'p'acer bars fi extend above the upper edges of the members 2 and are reduced and shapedto term 1' handles 'lfor use in rernovingfsaid'barsrj Means are provided for *detachably connect-i ing the sidewall mern ber s' 'z ,tq thedspacer bars 1 fla a a s t s m r s n a pai 9f upper and lower strapmetalkeepersa; 9adjacent eacnend off' each side wall member 2: Theikeep f located below the upperedges offthernembers 2' a distance suitable for a purpose presently seen, and the lowerfkeepersfl beingdocatedjat the lower edgesfoffsaid menrbers 2.; As best shown in i res 3 and 4; the keepers 8; 9 cornprise' end barrelsl l axially aligned transversely ofj said, 'rnemberssi in each pair. 'Ifhe "spacer bai's'li' are provided on the "inner side edges thereof with' upperand lowe pairs of keepers l2 1 3 similar l and lower pairsf'o'f keepe s8; S'at theappropriate L ends of said membersl n axial alignment with erably of elongated, rectangular form" and light strong material, such" as plyboard, and each hav-k ring a pair of flat cleats 3 on the inner face there!- 7 of suitably secured thereto andpreferably of l wood.

The cleats 3-extend"con1p1ete1y across said members 2 parallel with the ends thereof and project slightly beyond said ends, as best shown i in Figure 5. Half round, woodfiller strips] are suitably secured to the projecting portionsof the I cleats 3, rounded sides outermost, and fitted flush againstthe ends of themembers 2 so that each member 2 is provided at its ends with rounded transverse cornersr5, facilitating removal'of the core ifrom the concrete.

' l A pair of flat, pre ferably wooden, spacer bars t the V barrelsfljlej A" pair OfYStapIelike fastener rods 14 are rernovably extended throughf the posite ends of said-keepers, respectively; an I I through-the pairs dfkeepers l2 ,l Sfon the spacer.

"barsS, respectively;-

and any suitable material; and" having rabbeted- I' between theside wall Inembers 2 andthe spacer bars 9. The cover li'rmaybe providedgwith suit able'bail like handles 'i'l forus'e in removingthe same. Each spacer bar 6 is provided at its lower end and at an outer side corner thereof with a keeper lug I8 depending below said bottom and secured in place by screws. yEach side wallmemher 2 is provided at its upper edge, inthe transverse center thereof, with a short lip member 19 extending outwardlyglaterally from the outer The pur-r pose ofthe lugs l8andlip members l9 will presface thereof parallelw'ith said edge.

ently be explained;

The described core is designed to be used, in upstanding position, between concrete side forms 20, of plywood preferablmieinforced by vertical and horizontal cleats 2|. 22 transimpart aclear understanding of 7 without further explanation.

the forms, for instance, as shown in Figures 1, 2; and 3. The side forms 20 are suitably arranged in starting a wall 23, as shown in Figure 3, on the usualfooting, as is usual. The

cores l are interposed between'the side forms 20 and centered between the same in spaced relation thereto and in horizontal rows'with the cores inthe-row spaced apart, endwise, as shown,

.for instancejin Figure 2,so that when concrete l is pouredjin','a-horizontal row of cells '26, such as shown in Figures 6 and 7, is formed with side opposed pairs at each end of the core, a pair walls 21 and vertical transverse walls 28. Sueceeding' rows of similar cells, as'at 29, aie'built up in the same manner but with the cells stag;

gered horizontally'relative tolthe cells in a sub- -J'acent row. When the concrete is po ured in flush with thetop of a core I, therlip members el9'mold in'the upper edge and 'verticalcenter' of the sidewall of each cell, forinstance 21, a rectangular notch, asshown at'30,

Flat bridge bars 3| are set into opposite notches 311 which block escapeof concrete being pouredbetweeri the ends of adjacent cores I andtfrom falling of flat spacer bars interposed between'the pairs of cleats, respectively, parallel therewith and extending abovethe upper edges-of said members to provide handles, and means intermediate the side members for detachably connecting the same to said spacer bars. a

2. A core for use in upright'position between side forms comprisinga pair of --opposed rectangular sidewall members spaced apart laterally, and having uprightends, transversecleats on the inner faces of said members extending along each end of the members and providing opposed pairs at each end of the core, a pair of flat spacer bars interposed between the pairs of cleats, respectively, parallel therewith and extending above the upper edges of said members 1 to provide handles, and means intermediate .the

into snbjacent' cells 28, 29'andffurther' provide a base for forming the-transverse walls28 "Ihe lugs I l8'may be entered into edge keeper notches 352 in the, bridge bars to serve as anchors for stabilizing the cores-J in the side Walls 21 during pouring of the concrete and thereby prevent the cores from shifting, laterally.

a By, removing the cover 15 and withdrawing V the -fastener rods M, the side wall members 2 may be easily disconnected from the spacer bars 9, The spacer bars 9 may be removed frombetween the side wall members 2 by canting the same to displace the upper keepers 12 from beneath the upper, keepers 8, and then hooking one to the upper keepers I2 with a suitable tool, not shown, and pulling said bars 9 upwardly. 1 After the spacer bars'B- are. removed, the side wall 7 'member sjl'may be removd as desired. ,The l barrels of the upperkeepers l2 are slotted, as

at 33; to facilitateentering a fishing or hooking V eflforegoing, will, it is'believed, su'fifice to my invention tool 1 therein. I

' 7 Manifestly, the invention, as described is sus- *ceptible of modification without departing from. the inventive concept, and right is herein rescopeof the appended claims. I

What'I claim is: 3 I 7; 1. .A core for use in upright'position between side formscomprising a pair of'opposed recserved to such modifications as fall within the tangular sidewall members spaced apart laterally, and having upright ends, transverselcleats onvtheinner faces of said members extending along each end of the members and providing side members for detachably connecting the same to said spacer bars, said means comprising endpairs of. upperv and lower keeper barrels on said members, respectively, pairs of upper and lower similarkeepers on thespacer bars fitting in between the-pairs of. end keeper barrels, respectively, and a pair-of staple-like fastener rods extended through the end pairs of keepers,

' respectively, and the keepers on the spacer'bars,

3. 'A core for use in upright position between side forms comprising a pair of opposed rectangular side vvall members spaced apart lat: erally, and having upright ends, transverse cleats on the inner faces-oi said members extending along each end ofrthe members and providingopposed pairs at each end of the core, a

pair of flat spacer bars interposed between the pairs of cleats,v respectively, parallel therewith and extending above the upper edges of said members to provide handles, and means inter- 'mediate the side members for detachably ,connecting the same to said spacer bars, said side wall members. being provided, respectively at the upperedge thereof and inthe vertical center of the same with a lateral o tstandi-ng lip memher for moldinganotch in concrete, 4. A core for use in upright position between side forms comprising a pair. of opposed rec tangular side wallmembers spaced apart Iat erally, and having upright ends, transverse cleats, on the inner faces of said members extending" along each end of the members and providing opposed pairs at 'eachvend of the core, a "pair of flat spacer bars interposed between the pairs of cleats, respectively, parallel therewith and ex tending above the upper edges of said members to provide handles, and i means inteiimediate the side members for detachably connecting [the same to said spacerbars, said spacer bars having side edges extending outwardlybeycndthe ends of the side wall members to form keys for holding "in concrete.

" L i ABE Efe. 

